package com.jingdianjichi.auth.application.interceptor;

import com.jingdianjichi.auth.application.context.LoginContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 登陆拦截器
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String loginId = request.getHeader("loginId");
        LoginContextHolder.set("loginId", loginId);
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    //  postHandle: 该方法在控制器方法（Controller）调用之后、视图渲染之前被调用(视图渲染大概就是根据controller返回值生成html页面)
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        LoginContextHolder.remove();
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
